Teen idols Justin Bieber and Selena Gomez sparked rumours of a possible reunion on Thursday, when they were spotted together in Calabasas, California.

The singers dated for two years before separating in early 2013, and for the first time in months, they were photographed spending time together in Bieber's exclusive gated community.

Both Bieber and Gomez were seen riding Segways around his neighbourhood and consequently caused a traffic jam, as reported by Twitter.com user Nick Santisky to E! News.

He wrote, "Bieber and Selena segwaying in the Oaks. She was so nice, so he yelled at us. Shoutout to @justinbieber for holding up all the traffic in the Oaks. Grow up...

"Thanks to @justinbieber told us to f*** off, and his bodyguards blocked the road, so hello to my new followers! Gotta admit, I was kinda starstruck by @selenagomez but @justinbieber ruined the moment."

Bieber's representatives refused to comment on their reunion while E! News has yet to hear back from Gomez's team.